US Bridges

SR 7 over S Fk Tilton River

Poor

Lewis County, Washington · 2.8 N JCT SR 508 · Structure no. 0002442A0000000

Built
1938
87 years old
Condition
Poor
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
200 ft
5 main spans
Daily traffic
2,625
2023 count
Owner
State
State Highway Agency

About this bridge

SR 7 over S Fk Tilton River is a concrete continuous tee beam carrying SR 7 over S Fk Tilton River in Lewis County, Washington. It was built in 1938, so it is 87 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,625 vehicles a day, roughly 18% of them trucks, projected to reach 2,972 by 2039. The structure is 200 ft (61 m) long and 30 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesSR 7
CrossesS Fk Tilton River
Location2.8 N JCT SR 508
RouteState Highway 7
CountyLewis County
StateWashington
Coordinates46.58839, -122.24258
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length200 ft (61 m)
Longest span80 ft (24.4 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,625 (2023)
Projected traffic2,972 by 2039
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 7 over S Fk Tilton River built?

It was built in 1938, making it 87 years old in 2025.

What condition is SR 7 over S Fk Tilton River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does SR 7 over S Fk Tilton River carry?

About 2,625 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is SR 7 over S Fk Tilton River?

The structure is 200 ft (61 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns SR 7 over S Fk Tilton River?

It is owned by the State Highway Agency.